You have to measure the diameter of the existing sink. Without removing it you might have to craw under the sink and take measurements to see if it is feasible to fit the top mount sink you like. You will also have to check to see if your existing hole is smaller than the sink you want since it will be a top mount sink unlike the existing wich part of it is under mount. Also your plumber will have to seal the sink and counter joints to make sure there is no leakage. It's difficult but it can be done.

Just so you know that the sink you are intending to use is top mount and will add height to your existing vanity....

In order to measure you have to measure the existing hole from left to right and front to back and compare that to the specs of the sink you want to make sure that the existing hole is smaller than the sink etc. You might have to fill the opening with piece of plywood to help reinforce the new sink. Please check with your plumber to see if this is doable in your case. Good luck.

Best option is to get a stone top and do it right. have you checked local granite fabricators? They usually have remnants (left overs from other jobs) that you might be able to use at a reduced price without having to purchase a slab...

Good luck!

Thank you Filipe I will take all of this into consideration.