I've got the same set up. I've got the Shaw's farm sink with the prep sink in the island. (I just bought the house.) The previous owner installed the Whitehaus Vintage III with two different spouts/spigots. While the bases of the faucets are exactly the same size, the spouts are different shapes. You might try that approach. There are pictures below.

I am having to replace the Whitehaus cartridges because of a slow drip on both faucets. They are 10 years old. At least they are available. I spent hours trying to figure out what brand and design that had been installed. If it had been me, I would have selected a different arrangement. I prefer the single sprayer with a soap dispenser arrangement. The two separate hot and cold controls are extra motions. With the cross handles, I can never remember which way to turn them to turn them off. The lever handles might be better.

The Shaw's sink doesn't drain well. It requires the use of the sprayer arm every time I do something. It's very deep and hard on your back. It's pretty, but I would rather have my old Kohler Strive single bowl with a grid. I do like the fact that the drain is in the corner. The ceramic finish seems to be holding up to time and use.

At this point in life, I don't think anyone builds a good faucet. I long for the days when you could just stick a new washer in the faucet. I might suggest saving my money and buying something cheaper than the Rhol, Perrin and Rowe. Kohler, Moen and Delta actually have good warranties and stand behind them. Everyone else seems to be a reseller. Pretty, but flawed.

This is the main sink faucet

This is the prep sink

Good luck with your decision.

Wouldn't this work for your prep sink?