Yesterday I decided to work them side-by-side, again, in the black sand river beach using the same-size 8x9's. I also worked them in a really annoying iron infested site with their smaller coils, then I took them to a thirt location where electrical interference can sometimes be terrible. The conclusions I have reached are:
I prefer the Vaquero's color. However, I would prefer the Eldorado's appearance if it didn't have glossy side decals and that pukey, shiny odd gold colored rod.
I like the momentary pushbutton of the Vaquero for pinpointing, but I like being able to switch between All Metal for searching and Discrimination w/o having to turn the Disc. control knob like on the Eldorado.
I like the quieter operation of the Vaquero in dense, small-iron trash, but I definitely prefer the Eldorado's full adjustsment at the lower-end of the Discrimination as it goes into all metal accept. The Vaquero comes close, but not quite there. The Eldorado handled the black sand beaches much, much better.
Working near power sources at several sites the Eldorado was noisier at full sensitvity and had to be reduced to about 9-10 to match the quieter operatoon of the Vaquero at full sensitivity. However, that was in the Disc. mode. In All Metal, both were chirpy, with wavering audio threshold. In the Disc. mode I got the Eldorado sensitivity reduced to match the Vaquero. Then, on a few located coins (turned out to be pennies and dimes), the Eldorado actually gave me a better 'hit'. That is, the coil was able to be raised an additional 1"