The source of the vitamins are different.
There are synthetic sources, there are bad sources, there are ok sources, there are good sources. There's a university backed website that tells about the different sources of vitams.
Also you want to look for high quality minerals, i.e. chelated minerals.

Then the quantity (international units) of bodybuilding brands are heaps higher than pharmacy brands.
Pharmacy brands are most often expensive for what you get and probably underdosed like Blackmores, Swisse etc.

Some multivitamins have added stuff. Check out: Controlled Labs Orange Triad, Gaspari Anavite, iForce Athletic multi, SAN Dr. Feel Good, etc.
Or you can just go for 1 a day multi (cheaper but also lower quality) like bodybuilding.com brand.

Basically, multivitamins are there just to help you hit your micronutrients.

Compare the nutritional contents.
It is very tedious because of the amount of ingredient.

I don't think you'd actually notice the effects of multivitamins unless you're extremely vitamin deficient. It's just for general health anyway. But better to take high quality sources than low quality.
Gaspari Anavite has full dosage (3.2g) of beta alanine and LCLT (2g) - all in 6 pills.
CL Orange Triad has added immune support, digestion support, and joint support.

Anyone know where i can get my self some brown rice protein powder?

Anyone?

is that a brand?