Anyone who responds to questions or challenges about coin A with comments about coin B is a scammer, because this is an illogical argument that is being used to mislead observers and therefore fraudulently pump coin A and suck in gullible investor money to continue to prop up the scheme. This applies whatever coins A and B happen to be.
The only exception to this might be if coin B is Bitcoin and the question concerns general blockchain concepts since Bitcoin is the most well-known and understood example.
Replace "questions" with "questions or asserted facts" and "coin B" with "reputation of the person asking the questions or asserting facts" as another case of this.
Diversionary obfuscation instead of debating the facts.