Ok your photo looks like a fairly low end department store MTB. And your Ozone is a low end road bike (is it one size fits all?)

If both are fully functional, they have more or less equivalent value.

As far as should you do it?

At 6'1", you're likely too tall for both bikes.

If you wish to go with a MTB, look at 29er bikes.

If you wish to use the road bike, look at Large and Extra-Large sizes.