Boys are more stubborn than girls in general, but all pups require hard work.
WRT biting, this is important, and you need to do it now:
When the pup bites you, or something you dont want it to bite:
- Pick up the pup, quietly, and softly - dont say a word.
- pop them in a seperate room, ideally in their crate or bed
- walk out of the room without saying a word or looking at the pup
- shut the door
- count 1 minute
- go back in a pick up the pup
- take them back into the room and play with them
Repeat this until they get the idea, telling them off at this age isn't effective, you need to set their boundaries, and determine what it is they are trying to achieve - most of the time it's attention, so by isolating them for a short period you are removing them from what they want.
Don't tell them off, and then give them a second chance - they'll only learn they can get away with something and you'll just confuse them as they will identify that they can do what you dont want them to do.
Remember you have about a 15 second window to pick them up, otherwise they wont know what they are being isolated for.
If they are a biter, which your pup sounds like, give them things they are allowed to chew to help with teething - pop to your pet shop and ask them for some puppy chews for teething.
Forget about covering things in chilli sauce, or something horrid tasting, dogs have far less taste buds than us, so they'll just plow through the heat eventually.
If you don't lay down the rules now it will be a lot harder once they get older. A younger dog is far easier to train than an older dog.
They have no boundaries - so at the moment, anything goes - you need to build up mental fences in their mind about what they can and can't do, you're the shepherd and the pup is your herd