Not much has changed over last year's Blade 15 from a design perspective, but the new 10th gen 8-core Core i7-10875H will offer noticeable raw performance gains over the older 9th gen 6-core Core i7-9750H. The jump from the older GeForce RTX 2070 Max-Q to the latest GeForce RTX 2070 Super Max-Q, however, will be much smaller.
https://www.notebookcheck.net/Razer-Blade-15-GeForce-RTX-2070-Super-Max-Q-Review-Same-Laptop-But-Faster.485084.0.html