Are Atma-Sphere MP-1 and VSE RTP-3D similar?

Look similar except for the dual volume control and tube comliment. I'm thinking of purchasing one of them.
Dracule1 (Reviews | Threads | Answers)

They look nothing alike internally or externally, IMO. Also, they each use completely different tubes, as you mentioned.

I know from personal experience that Atma-Sphere provides exceptional customer support, and the company is in the USA, if that makes a difference to you.

Vacuum State is also highly regarded from what I have read.

I don't think I can direct you to a photo of the MP-1 internals. I own an MP-1, so I have the advantage of being able to compare.

:)

Modwright and MP-1 were the most similar of the three. Both are transparent. However, the Modwright sounded too much like solid state for me. Rather one dimensional, IMO. I believe Modwright preamps have come a long way since then.

The Supratek just didn't match well with my amplifier, so I can't really give it a fair appraisal.

The line section of my MP-1 MK III is very quiet. It is not dead quiet.