It appears as if the verb, verkar, functions alone when the structure of the sentence is subject+verb+adjective: Maten verkar god. But when the structure of the sentence is subject+verb+dependent clause (signaled by att), then I need to use verkar som: Det verkar som att de kommer. (It seems that they are coming). This would mean that the use of any subordinating conjunction (om, när) would require the use of verkar som. Do I have this right?
I assume you mean Det verkar som att du inte är intresserad. In most everyday usage, there is no real difference in practice nowadays - but there can be a difference, based on how it used to be, namely:
- som att implies that it might actually happen.
- som om implies a comparison to something that is not realistic.
I'm old, but "seems like + verb", although common in spoken English, is not good English. Seems as if or Seems as though are better.
"With the verbs of the senses (look, feel, taste, smell and sound) we can use like and as if or as though. (The last two are the same). You only have to take into account that like is followed by a noun or noun phrase and as if, as though are followed by a clause. Your brother looks like a rugby player. (noun phrase) You look as if you haven't slept for ages! (clause: Subject + Verb) You are so pale! You look as though you had seen a ghost! (clause: Subject + Verb)." - https://inmadom-myenglishclass.blogspot.com/2014/03/as-like-as-if-as-though.html#:~:text=With%20the%20verbs%20of%20the,are%20followed%20by%20a%20clause.&text=You%20are%20so%20pale! (emphasis mine).