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Okay, don't go into full on crazy hype mode there... it can be counterproductive. It's not dump ETH, Go Lisk, especially with how well ETH has been doing lately. I strongly agree with hoertest, coins considering others rivals, then trolling back and forth, is just annoying to everyone... and it doesn't matter anyway. Not like if ETH goes down, Lisk goes up (and certainly not the reverse).
Instead point out how well ETH is doing and how there is room for more than one smart contract currency. Competition is fine, but right now nobody knows about Lisk, while ETH is going insane. Use that to your advantage... the better ETH does, the more interest there could be in Lisk.