Hi dosun,
Your mattress would be closer to a memory foam mattress than a latex mattress since the top layers contribute more to the “feel” of a mattress than the deeper layers although with only 2" of memory foam the “feel” would be more of a combination of the properties of memory foam and latex with the memory foam tending to be more dominant. More accurately yet it would be a memory foam/latex hybrid.
I would also consider sleeping on any new mattress for a minimum of two weeks (and better yet 30 days) before making any changes if you aren’t experiencing any significant discomfort or pain because our bodies develop a muscle memory and a sense of “familiarity” with what we are used to sleeping on and it can take a few weeks to adjust to the “feel” and sensations of a new sleeping surface that is different from what we are used to.
Many people are quite surprised at the differences in how they feel about their mattress after a month or so compared to how they felt when it was new.
Which latex topper did you use … the medium or the firm? Did you prefer the “feel” of a latex comfort layer more than memory foam?
The component post here includes several online polyfoam suppliers that carry many types of polyfoam in a range of different densities and firmness levels.
I haven’t looked in the New York city area for foam shops but most larger cities would have a number of local sources as well. A quick google search on “foam store new york city” brought up a few stores that sell a range of polyfoam including …
http://www.canalrubber.com/foam-polyurethane-foam/
https://www.economyfoamandfutons.com/futon/scripts/default.asp
Phoenix