What is your style for the bathroom the first one is very traditional and the second quite a modern look

First, the trim kit must match the valve in both brand and output. Your designer should be walking you through this.

Every time I have went to a store to talk to designers they follow up with large numbers on the project. Astronomical. I am fine without a designer as we aren't changing the layout of the room and my wife and I are very comfortable with our "design" decisions.

Patricial Colwell Consulting I like the "Moen Align" shower head and handle but very much dislike the faucet. I would say I'm a mixture between traditional and modern; That said I am looking more at other Kohler products now like "alteo" and "refinia" as I think "Bancroft" isn't my style. The reason I had first leaned "Bancroft" was because I thought many of the designs at my local Kohler store were definitely not my taste.

The trim kit is useless without the right valve in the wall. It’s not interchangeable either. Koehler fits Kohlet valves and Delta fits Delta valves.

What the right valve is, depends on your needs. A simple tub shower is usually under $500 for everything in chrome, in a basic style. Start adding fixtures that need multiple output ports, or going into specialty finishes like brushed brass, and the valves and trim both change. And you can have 2K in shower plumbing in a heartbeat.

If you are getting large numbers, then it’s your requirements to do what you want that are driving the numbers. You contro the pricing by cutting back on the features and finishes.

Sophie thanks for comment. Of course I wouldn’t mix values.

We are installing a kohler air tub, onyx collection subway tile design walls (white) to ceiling with crown moulding, and Kohler Refinia bath / shower trim.

I had some home builders want $10,000 to install (separate from product cost) and other reputable companies less than half. Not always about what is done of course but sometimes yes ;-)