Different wood floor types between levels?

[Leland S.]

Alright... my rehab managers had trusted this hack contractor to buy a cheap bamboo. It looks pretty nice actually and I liked it, but after installing the upstairs my managers noted that it dents very easily and was soft. Turns out it has a Janka of 1400ish. It isn't stranded. We bought at $1.7/sqft. Now they've decided to go to this Coretec product at $3.2/sqft that supposedly is fully waterproof, needs no moisture barrier, can go in kitchens and bathrooms, floating floor no glue required. So my managers are claiming it will save me money in installation regard. 

I'd rather not lose the 1k in materials I spend on the upstairs plus the probably 1k in labor to install, but I really don't see it being correct to have two different types of hard wood floors in the house. 

What do you think? 

See pictures of installed floor and new floor for downstairs and steps..

https://goo.gl/photos/Gq8SYVKujzyd3MaU9