More or less.

• Zswap is better than zram because it’s integrated with the kernel. Swap in zram is more of a hack.
• zram can kill your file cache unnecessarily, which leads to more disk reads.
• Don’t use zram without an oom killer.
• They’re working on zswap to not require any disk swap at all, basically killing the last reason why one might want to use zram over zswap.