In my opinion there is little difference between Toyo's 100 wear and RE71's 200 wear compounds.
It is impossible to compare these tires directly as my R888R's are 295/30/18" W 10.5" wide rims square different offsets from stock. The RE71's are staggered 255/40/17 and 275/40/18" on 8.5"F and 9.5"R stock wheels. Night and day performance just based on footprints. The R888R's stay cooler and are super consistent here in FL.
The RE71's are better in the rain due to the enhanced tread pattern and narrower. The R888R's are more like a rain slick that even with limited camber I cannot get to understeer at autocross speeds even when cool. Many times my first run stays the fastest out of only 3. When 4 or more runs the latter are always much faster for a variety of reasons mostly brain related.
So it comes down to availability of sizes. Most 200 wear tires stop at 275mm in 18" except for the 285 RS4 legal for STU. (I'm running RS4's on my RX8 255/40/17" square on 9x17" wheels in STX - excellent in heat and rain - reasonably priced).
I can fit an R888 in 305/35/18 on my 10.5" rims but they aren't legal for STU as 100 wear and over 285mm. So running in Prepared is legal but running a stock car with sorta gummy tires puts you mid pack at best. For the same money I'll try the 305's next season:) No more Lincoln trips for me. I quit at Topeka. Just in it for the fun and friends anymore.