Well price for one! We were looking at both this weekend and I think the plus works on some of the bugs, while the sluggo just deals with the slugs/snails. That's my understanding.
The $ difference is about $10 though!
They need to send you a return mailing certificate. They messed up on the order!
Either demand a refund of the difference between sluggo and PLUS, and go get the plus, using the sluggo in other areas, or demand a return mailing sticker, mail the reg back to them and wait for the new sluggo plus to be sent to you. By then all of your plants will be eaten!
Your choice! Nancy

I believe the Sluggo Plus has the benefit of also containing spinosad for the pill bugs and ear wigs. You're probably going to want to return the regular stuff, since it's lacking the one ingredient to kill exactly what you wanted it to kill.

Yes, I finally figured out the difference was the spins ad.
Luckily, Amazon has a great return policy. I just clicked on the return button, filled out a reason, printed the label, reaped the box and left it by the front door. The brown Santa Claus came by and picked it up.
I reordered the correct stuff, should be here tomorrow.
Thanks!
Oh, I lost some beans but the rattlesnake variety is pretty tough so most outgrew the pill bugs, I may need to replant a few but maybe only lost 25%. Not too bad. I probably planted them too close, anyway. Was wondering, would it be possible to transplant a few of the good ones to fill in gaps?

I have both, not sure if Amazon misled me or I didn't know the diff when I ordered - which was long long ago, so no option to return, argh.

Good to know the regular will work on slugs, will see who I get besides the birds!