True - Just to get specific here, it’s also a difference in voltage (12v vs 15v) and power connections. You can’t just put a 5U module in a eurorack skiff, as they have completely different power cables. Once separately powered in different cases, you can interface with the two of them easily, though, as both formats accept the same control voltage and audio standards.
Fun endeavor to make a 5U box with eurorack, however.
For anyone: You would need a separate power connection and case, but there’s some unique modules in 5U format that make it worth it. Easiest out of the box case to get started would be either this six-space Moon case (which is power and cabinet) or a four-space Dotcom Box along with a QPS4 to power the dotcom box. You’ll want to be mindful of power supplies for more modules, but this should get you started on a small system pretty easily.
If you’re enjoying eurorack, 5U is an easy upgrade with a lot of benefits, both in creative experience and sound, but yeah it’s all a larger format. So much cool stuff in it, though. FSFX converts a lot of eurorack into 5U size, for example. Check out their Mutable Instruments conversions.
