LISK is better because it is on the verge of something big. The SDK will be released this year allowing DAPs to be developed on their blockchain sidechains, using javascript the most popular programming language. Also there is a rumour it going to be listed on bithumb very soon!
I think XAS (ASCH) is better than LISK, the reasons:
1) both XAS and LISK are forked form cryptopi, but XAS is getting a leading step than LISK since there are some DAPPS now, faster than LISK;
2) the XAS are much cheaper than LISK now.