The K80 will have overall better spec, just that it doesn't has Micro SD slot.

K80 and P90 should be the same phone with the same spec.
Only different is K80 do comes with a variant with 4GB RAM and 64GB storage.
Because both phone do not has memory card slot, it is encourage to choose the bigger internal storage one.

However, if you can live with just only 32GB memory and 2GB RAM, then choose the P90 with original Lenovo warranty, but surely I won't recommend with only 32GB memory.

Enuf or not enuf depend on usage and people too.

The main problem is it don't has micro sd slot.
So, when you really need more memory, you just can't expand it.

Normally OS will take around 4 to 6 GB, so left around 25GB for apps and other file storage.
If you think 32GB is enuf for you, then go for it, but you can choose P90 for original Lenovo warranty.
The 4GB RAM doesn't make much to increase the performance either.

where can i buy this phone? lelong macam no 1 sell.
solely for hotspot. phone with little pre load apps good also i think.

1st. go on and dream.. unless u wait for Samsung S7

2nd. u wanna troll, go /k troll; this is not your troll center