Replying to Pvc box vs the real deal

I'm a beginner at park that just built a pvc box for my summer setup so I can learn to slide a box before the season starts. I seem to be making a lot of progress with it, which is weird because ive had no luck in past attempts at terrain parks, and i'm not slipping out or anything, so i'm wondering how well pvc boxes slide compared to ones at terrain parks. my main concern is that i'll learn to slide my home made box, and then when i try to do the same at an actual park, i'll slip out because of the difference. Keep in mind im covering the pvc with wax and/or laundry detergent as suggested to make it more slippery. any info/pointers appreciated!