We have been to TTR many times, DRM 5 times and Pearl once, and going again in November. There are things we like about both Desires.
Pearl is a smaller, which is nice, but both the pool and hot tub are larger than RM, which seems it inhibits the mingling. We think the rooms are nicer at Pearl, and we love the hot tub is on ground level! No steps to have to negotiate! LOL Service is top notch at both locations, and we felt the food was just as nice at both places.
We have been to Temptations 15x ,Desire Los Cabos 3x, Desire RM 12x and Desire Pearl 15x. We are going to Temptations Mar 6-14 and Pearl May 22nd. For us Pearl is the ultimate, the food and service excellent better rooms hot tub is the best. Pretty much it has been 15 straight times to Pearl with 2 Temptations thrown in for something different.