There are other reasons for going for angle of climb rather than rate. For example, getting above inbound traffic might give you an earlier climb to high level. If you are worried about birds for whatever reason, or know things about the local traffic situation, or are in US airspace and don't have a choice, then there are reasons for sticking with 250kts/FL100.
However, my understanding is that all else being equal, from an aircraft performance point of view, the best strategy is to go for best climb speed.
A vague hunch that your aircraft might be different from all the others doesn't constitute a valid reason for not doing it.