I have both, if by classical guitar, you mean, nylon string guitar. I play anything on my nylon string, crossover. I use my finger nails and they are a little long. My wife hates them and is constantly telling me to cut them down.
I switch from my nylon string guitar to my banjo, to my tenor ukulele with very little adjustment. I also have a 12 string guitar with steel strings which is tuned down to baritone levels. I play all four instruments with my fingernails. All four are as loud I need them to be.
The lower tension on my 12 string (B,E,A,D,F#,B) doesn't wear my nails down and feels very close to my nylon equipped instruments. My banjo is also strung with nylon strings which I make up from harp strings. It is a long neck and regular sets of nylon banjo strings are too short.
I gig these instruments about 4 times a month using a mic rather than onboard pick-ups.
I have owned many true classical guitars over the years but the slightly narrow neck (1 7/8 nut)and 18" fret board radius on my Martin 000c make the switch to my 12 string easier than using a true classical with it's flat fret board and 2" nut width.
'Oli L2 koa baritone uke/'Oli rosewood baritone uke
Kanile'a Pahoku baritnoe uke/Primrose baritone uke,
Pono Bn-3-4 tenor guitar, Pono Bn8-1 8string tenor guitar, Republic Hwy49 tenor resonator guitar
Hoyt/Ode custom model33-19t tenor banjo, Hoyt custom 10"maple baritone banjolele