Asic can just be more efficicent, no need to have supérior hashrate to call it an Asic. Look skein asic, they are 20% costlier than GPU. But use 5 times less electricity
The only Skein ASIC I am aware (Baikal) of has 2.5-3 TIMES the performance of the 1080 ti - and Skein is one of it's "minor" algorithms that it gets lower hashrate on.
ASIC do NOT "usually raise the price of a coin" - they are normally developed when a coin has a high enough total market cap AND network hashrate to make it possible for an ASIC miner company to sell enough to PAY for the development of the things.
You have the relationship backwards - it's high PRICE that drives creation of an ASIC, NOT the other way around - and in the case of the Gridseed GC3355 based ASIC gear the ASIC showed up after Litecoin price had COLLAPSED and Bitcoin price was dropping.