Hi howdy2u.
Welcome back after almost 4 years! but most importantly congratulations on the new TG Topper that you seem to be enjoying 
It is nice to get confirmation from multiple sources that Ultimatesleep is now sourcing their Talalay latex from Talalay Global. Thanks for your update.
I wouldn’t worry too much about the smell at this point as this usually dissipates quickly especially if you plan to “air it out”. Almost all foam materials will have an initial smell that will dissipate fairly quickly to levels that most people don’t notice although some people can indeed be more sensitive to certain smells (or even describe them differently than others … but your description of a “semi-sweet” or “vanilla-like” odor is fairly common. The more natural (100% NR) can have a more “rubbery” smell. This usually dissipates in a few weeks. There is more about the smell of latex in post #2 here but in most cases, it is reduced to levels below what people will notice in a few days to a few weeks but this can also depend on how acute your sense of smell is and on how sensitive you are to that particular smell. There is also more about the odor of new materials in post #3 here that may be helpful as well
I look forward to any further updates you may have a chance to post.
Phoenix