No probs sir, its REALLY difficult to choose, for reference my wants and wishes from either system:
MUST BE M-ATX (Not ITX, I need 2-3 PCI-E Slots)
Looks really nice
Smallest possible M-ATX Case (needs to be 'portable' - in that I can carry it in my car to another office - so small as poss and not draw to much attention to it self, 2x shoebox size roughly - basically a 'lan party build')
Fit 2 M.2 Drives + one 3.5" + 2.5"
Ideally an optical drive but not essential (I write bluray for clients)
Intel 7700k Advantages
Super mature platform
I can have all of what I want above easily with many options
Powerful single core threads
Well specced amazing M-ATX boards
Disadvantages
Only quad core - 8T
I feel the 8T limit now on my current intel - im always doing a lot at once (video, photo editing, my CCTV cameras software is running etc)
Dead end z270 platform
Ryzen Advantages
TONS of threads
Beats out x99
Cheaper
Reasonable single core performance
If mainboard manufacturers can work a miracle and make high speed mem an option (but i doubt that)
Disadvantages
Rubbish M-ATX Options (NO 'x' series yet - when?)
Buggy, needs maturing
Dual channel memory - ok 7700k has that, but 8c 16 thread.....it obviously matters as tiny mem increases massively changes ryzen
Struggles with higher clock speeds
Memory is picky right now
Its literally a knife edge - they are exactly opposite, whats ones strengths is exactly the other weakness.