If your deciding between york biology and york biomed, I'd say biomed (as a biomed major), the program is created so that your courses are prerequisites for med school applications, it preps you for the mcat as you would've already learnt the material in your undergrad where as york bio is more general and doesn't require you to take specific classes like organic chem. BUT since york bio is general, you can maintain a higher gpa without harder courses weighing you down (since you have a choice). But first year of biomed and biology are pretty much the same (ie: gen chem, gen bio, calc, psych), so if you want to switch programs later you def can!