If you hit up fangraphs defensive ratings and sort is for LF with at least 700 innings, Andrew Vaughn ranks 4th out of 15 qualified players. Expand that out to 300 innings and he is still 15th out of 45.
Statistically, Andrew Vaughn was a significantly above average defensive LF.
It's probably a little harder to get a good reading on Sheets because of SSS, but he had -32 and -35 UZRs in LF and RF respectively, compared to 0.5 and -20.2 for Vaughn.
So far, Sheets looks Fisk in LF bad in the OF, and Vaughn looks above average vs his peers.