When you use "看起来“, it means you can tell the fact by what you have seen, however, "好像” means you guess for a reason but you are not sure about it. 看起来≈ it looks like, it seems like 好像≈ it might be

看起来 = it appears that 好像 = similar to

Thanks.

看起来:look like 好像: seem 看起来好像: seem

I'd say that there is no big differences. Both are adverb. 看起来 = it looks like 豬血糕看起來很好吃 好像 = it looks like or it seems that... 豬血糕好像很好吃