There is a disagreement between Solana founder and Matter Labs CEO about which is faster, Solana or ZK.

CoinVoice recently learned that Solana co-founder Toly said in response to questions from the community: "ZK is slower than traditional computing. As a result, since there is no religious reason to limit the full Node capacity, Solana is always faster than ZK. In response, Alex Gluchowski, CEO of ZKsync developer Matter Labs, said, “ZK is always faster than Solana because it’s secured by math rather than validators, which means that one or a few validators (for redundancy) are enough and there is no need to wait for a consensus between thousands of nodes.” [Original link]