Velleman K4020 and K4010 difference

Hello!

Six years ago i bought and assembled K4020 kit. It has turned out as great amplifier so now i would like to buy another one (for bi-amping).

I found out, that this kit is not available anymore, but there is another, K4010 kit, which seems to be the same. I suppose, that k4020 consists of two k4010 modules.

Are there any differences in circuit? Are heatsinks the same? What about mains transformers?

I would like to hear everything you know, before i order two of them online.

K4020 = 2 x K4010 in one enclosure.
Enclosure no longer available.

thank you for the answer! however, i am planning to build new enclosure by myself.