Well It depends on your guitar, as your's is a copy (very nice one at that, i love it) It may differ from stock.Im pretty sure stock mustangs would have a 8.75mm post hole diameter, so unless you are happy to expand that to 10mm, you do limit yourself to only 8.75mm tuners, im prety sure Grover's are all 10mm.Im sure you could the Klusons in the smaller size though. As for one being better than the other, they are both quality tuners, i would lean towards the Grovers myself, i like the extra meat on the post.
I suggest you remove a tuner and check what the stock size is, you dont want to buy 8.75mm tuners and find your headstock is drilled for 10mm, that would suck!
HTH
