hey Guys

basically guys ive got a 300k hand sample at 4 tabling 25nl zoom on PokerStars and have a good win rate of 4.7 bb/100. At 50NL however ive got a 60k hand sample and only beating the game for 1.2 bb/100. Is it just simply more profitable to play 25nl as there are much more fish or is just that the regs are much stronger at 50nl?

It is also worth noting that im 19 and only been playing for a year and maybe im scared money.

Can someone advise an action plan or ideas?

thank you.