The XTR and Fuel are almost identical... It really depends on which base cam and module you fall into, but they make good speed, smooth draw, with a solid back wall... I wanted a shorter valley with more holding weight so I went 1/2" longer on the modules, but set the draw stop 1/2" shorter and retimed the top cam... It's pulling 58lbs and holding 18lbs, They feel very similar to Spirals now...