What is better Molson lager  beer, or bud light?

Molson Canadian is meh

You can't really compare the two, actually.  Molson is a Canadian recipe, and is laced with alcohol.  Bud Light is also called Sex In A Canoe, because it's f**king close to water.

Merlot or Pinot Grigio.

Molson lager                                                                      

They're very similar, but Bud Light is a light beer so it will have less alcohol and a little less flavor, but both are not very good. I'd buy what is ever cheaper if those were my only choices. But if you buy Molson you will impress your Canadian friends and people who don't know anything about beer will think you are upscale.

How about water until graduating from kindergarten ?

Chilled horse urine would be better than Bud Light.  Molson Canadian is meh, but compared to Bud Light it's the nectar of the gods.