Precharge is far easier to shoot accurately,quieter,and most will double up as a target gun,if that floats yer boat.Downside is they need an air supply,which adds to the initial cost.
Springer is self contained,needs no charge,but are noisier and take more skill to hit the target.
If i was after my first gun,id go for a second hand AirArms S200.For £300,you would get a used S200 in good condition,with scope and bag,and probably still have enough left to get a second hand divers bottle.HTH's Bill