new to hobby so take everything with a grain of salt
3203 is thinner than 205g0, allowing for use in switches without risking any gumminess. i like to use even in linears since I am particular about a very light amount of lubefeel, plus 205g0 will typically feel gummier at first before breaking in fully. 3203 feels great immediately, which gives me good feedback on proper lubing amounts as I am new to the hobby. the only complaint i have is that the included brushes are quite bad to work with, and you would be much better off with a paintbrush. I decided to not buy a paintbrush with my order after seeing that the lube came with a brush, but I regret this. Great product though, just buy a brush to use with it!
