I was going to say if you were local to me I would let you have a spin in my 70 but sadly just a little too far 😠( Winchester here)
I went from a 350 DE to the 370z limited edition jobby. As someone has already mentioned the 350z feels a more raw driving experience and the 70 feels a little more refined when driving ( perhaps lacking a little more soul than the 50???) The looks of the 70 can be marmite for some, for me it needs to be modded aesthetically for it to be pleasing to the eye.
Best thing to do is get yourself in for a test drive and see what you think.
Ps. The Synchro rev is lovely and very addictive