Yes I believe the same concurrent connection limits apply to R80.20SP, I don't think Hypersync has changed much fundamentally R80.20SP to R81.10.
The source for the maximum number of concurrent connections under Maestro was taken from this article which is in the Partner community section, and you therefore may not be able to access it:
The new official Maestro Expert R81.10 ATC-based course has all this information in the courseware, which pulled together many, many sources for its content. I know this because the current Maestro Expert R81.10 course offered by ATCs is based on a private 2-day Maestro class I myself created for a very large customer, then Check Point acquired the material and adapted it for the official course we have available today. The class is the best single source for all the Maestro material out there as of R81.10 because to create the class I had to read through, absorb, and compile the course material from all these sources:
270+ SK articles
300+ CheckMates Maestro-related threads
15 Slide decks from Maestro-based presentations
1000+ pages of official documentation
My company Shadow Peak is not able to run the official Maestro classes going forward due to hardware limitations, so the above is not just a sales pitch for my own benefit. Give the Maestro Expert R81.10 course material a look, you won't be disappointed and you'll want to attend the class. @Anatoly @Lari_Luoma care to comment?
New 2-day Live "Max Power" Series Course Now Available:
"Gateway Performance Optimization R81.20" at maxpowerfirewalls.com