Currently Novarossi is selling several 35 plus models for arround 200~250 euro, I have thee 2016 model and a JP 35V2 and all have the same timings. On its way is also a blackhead Flash which is sold for less than 200 euro and I think it has also the same timings but soon I know.
I stretch them all up to what I like and they all run fine.
A fellow driver is using ISON21 models and does give them the same timings and indeed we run equal and even my previous 5 port engines with a multi exhaust port are running as fast with the same timings. Only the piston does not have a long life with those performances.
And still with Novarossi I would expect that out of the box the 7 port must be slower but again it can also be different in the chosen materials like piston alloy, maybe a different crankshaft (2 or 3 weights) and visual tuning like a larger scoop in the crankshaft and teardrops on the sleeve. Small things that can make a small difference in quality and performance.