Hemigrammus rhodostomus vs hemigrammus bleheri?

[iloveshramp]

I have some true rummy nose tetras (Hemigrammus rhodostomus) and decided to add to my school and picked up three more recently. When I got home, I realized they look pretty different from my rummy's and did some investigating. What I got is definitely Hemigrammus bleheri - firehead tetras but also sometimes called rummy nose tetras.

I'm wondering if anybody has experience with the difference in these guys. My new bleheri's are much larger than my rummy's, and so far seem more aggressive to my other fish. Google did say bleheri's are usually bigger, but is it common for them to be more aggressive?

I'm honestly a little put out and feel like I got duped - am I overreacting?

 

[Essjay]

Virtually all rummy noses for sale these days are H. bleheri. The profiles of both species on Seriously Fish give the same size and water conditions etc for both.