Cubase to Nuendo update

I am a cubaser for long time and on cubsae pro 7.5 and wish to upgrade to 10.5 but I was hoping it will be a promotion for cubase upgrade on June but it went to Nuendo 40%.

I have checked and the discounted upgrade to Nuendo 10 is $359 vs Cubase 10.5 update $298

I am not familiar with the difference bet both and it is realy worse the upgrade to Nuendo

Help please, thanks

See the answer I have posted to a very similar question in another thread (click).