For the sake of my sanity, I'm just going to call the samples 1 and 2 since they have the same needs and the B/F thing is going to lead to typos and confusion. You and I both know what I mean here.

Overall: Your soil has issues. They're not hyper-severe and this is not a soil collapse situation, but the soil definitely does require some assistance here. The requirements of Bermuda and Zoysia are close enough that they can be treated more or less identically and I've adjusted where necessary. The discussion is below, with directives in bold, and a list of recommendations rolled up at the bottom.

Depth 6": We usually use 4 since most grasses have feeder roots there, so I adjust automatically.

Exchange Capacity 5.6, 4-ish: Probably sandy with a bit of silt, perhaps, or a titch of extremely light clay, but not much. Workable, but it won't hold resources for long or reward you for overloading the soil too much at a time. You'll have to stay after this soil. Test every other year.

Organic Matter 3.5%, 2.8%: OK. For a low-EC soil, try to push this as high as possible. Always mulch mow, mow in all leaves, toss dead garden stuff on the lawn, feed organically, and so on.

pH 5.7 and 5.3: Low-ish and low, respectively. Much more later under calcium, magnesium, and potassium as pH, by itself, tells us practically nothing.

Sulfur 12 and 16: Fine and within normal range for a sandy soil. Sulfur is used everywhere, but not in large quantities. We have tons of margin to play with, which is good, we're going to need it.

Phosphorus 87/49: Low and very low. Target here is 200 for both. You're going to need starter fertilizer.

Calcium 54% and 41%: Both low, the second quite low. Combined with the magnesium percentage, I've actually agonized over this one a bit but ultimately held my ground. Let's go with a high-calcium lime just because of the speed (high-magnesium limestone tends to be cheap, poorly ground, slow, and have additional chemistry problems). Fast limes include Mag-I-Cal, and most other calcium limestones around $9-12 a bag. If the "calcium" lime costs $4 a bag, it's not of sufficient quality. Apply this at 7 pounds per thousand square feet at least 2 weeks before OR after the starter fertilizer application. I'm scheduling it for June 15 and end of season.

Magnesium 9.9% and 8.7%: Not horrendously low, but adding calcium is going to drop this a bit lower and displace a bit of magnesium. I'd also, in low EC soil, like to boost this a tiny bit. Pick up a nice big cheap bag of Epsom salt, store brand. I scheduled 1 app for end of season.

Potassium 3.6 and 4.1%: A little low in terms of pounds per acre but not showing in the percentages due to the other shortages--it will, but let's ignore this for now.

Sodium 1.8% and 3%: A little high and high. This is due to there being a lot of spare space in the soil and not something I'm worried about at this point. Sodium is toxic, but the actual numbers aren't that bad, and the incoming calcium will kick this out.

Trace Elements: There are some problems here; copper could be a bit higher in #1, which I'm inclined to ignore right now as you have bigger problems. Iron's inconsistent, but that's not a major issue and again, I'm ignoring this. Boron is an issue as it's off the charts low.

Boron <0.2 / 0.31: Grasses aren't particularly boron-sensitive, but <0.2 is really pushing it and 0.31 isn't exactly great (although actually, tolerable). Still, I'd recommend boosting this across both zones since you have to do it in #1 anyway. The easiest mix for this is Milorganite and a box of 20 Mule Team Borax. In a wheelbarrow or other large container, pour the whole bag of Milo and 6 tablespoons (yep, tablespoons) of 20 Mules per thousand square feet of soil you're going to apply this to. You can damp the Milo slightly to get it to stick. Mix extremely thoroughly and apply over the entire area. If you slightly miscalculate, that's not a problem.

Recommendations:

June 1: Feed the Bermuda and Zoysia lawn with starter fertilizer.

June 15: Apply 7 pounds of high-calcium limestone per thousand square feet. Apply Boron using the Milorganite method listed under Trace Elements above.

July 1: Feed the Bermuda and Zoysia lawn with starter fertilizer.

August 1: Feed the Bermuda and Zoysia lawn with starter fertilizer.

September 1: Feed the Bermuda and Zoysia lawn with starter fertilizer.

October 1: Feed the Bermuda and Zoysia lawn with starter fertilizer.

October 15: Apply 7 pounds of high-calcium limestone per thousand square feet. Apply 2 pounds of Epsom salt per thousand square feet.