.050 vs .063

.050 vs .063 only difference is the drivers on the .050 are shaved down. links and cutters are the same 3/8 vs .325 same width but.325 has cutters closer together drive both with 7 tooth sprocket as in 7x.325=2.275 vs7x.375=2.625 so the .375 moves 15 percent faster witch almost makes up for the...

I have a ms290 with a 16'' bar, .325 pitch, .063 gauge, 8 tooth sprocket . I'm about to get a 20'' bar for it. I was planing on getting a stihl rollomatic es because i want the replaceable tip on it and they seem to be better quality over the standard e, but the 20'' es only comes in 3/8, .050...