in my opinion both are good but my preference is wifi direct as nearby share need to enable wifi bluetooth location at the same time on both device but this is not in the wifi direct case. and speed is almost same for both no Required bluetooth on not Required wifi on
bro only for your information just i transferred my 13gb of file through wifi direct within around 7-8 minute (i forgot to count exactly so may be 1-2 minutes plus or minus. i didn't feel the time
