I left them years ago, but their VPN software has (had?) a critical bug - the killswitch treats “connecting” the same as “connected”.
Meaning that if the connection drops for any reason and is not immediately reestablished, you not only lose all protection, but you have a false sense of security.
Some quick googling suggests that their single-thread performance is really close, but the AMD has triple the cores. Plus extra RAM is always good, and looks to be the newer and faster DDR4.
The main question for you becomes how multi-threaded your needs are. If you don’t need more than 4 cores, then switching won’t give you anything more. There’s also the smaller question about RAM, with the same criteria.
If your needs are highly multi-threaded, or RAM-constrained, then switching will be very worthwhile.