Hi @Kat11460 I only use Airbnb as my only booking site. Our property I consider to be located 1 street from the beach and a 3 hours drive from Sydney and sleeps 4 and 2 bedrooms. Ideal for families, couples or friends.
So to me it is location and what is offered and price. There are 5 Airbnbs within 400 metres of our cottage. 3 of us live on site and 2 are remote hosts. They are all different in size, decorated, some pets others no. Some children others no. Some sleep 2, 3, 4, or 6.
Some use other sites, Stays, Booking and Verbo. But when you walk around the block you know if they have guests staying or not. You can also look online and see who has bookings. I often notice that sometimes their prices are higher. But I feel you have to price what is right for you and the area.
Pictures also sell your product. All have good reviews.
So I know there is competition out there in my neighbourhood. But I cannot complain Airbnb has served me well so far and I have more than enough bookings to satisfy my needs.
Sorry I am unable to help you with multiple plateforms advice. Just answerering @Jenny's call.