Best DSLR all-in-one scan system

I am going to buy my first DSLR film scanning system. I've discarded all of the copy stand system, mainly for size reasons.

I've come across these three systems:

• Valoi easy35 − 229 €
• BlackBox Holo − 295 € (354 € with MF film holder)
• BlackBox 135 − 185 €

In other posts I've read that the BlackBox have a better overall build quality, and also a higher quality light panel. However, I couldn't find any review on YouTube about the BlackBox system, while there are many videos abaout the Valoi one. Furthermore, I noticed that the BlackBox system doesn't have the knob that let you advance the film, while the Valoi one seems to have it.

I cannot understand the price difference between the two BlackBox models.

Which would you suggest me to buy? I have to scan tons of rolls (10 years of old photos), and of course I'll use it also for future rolls.