The only comment I would make, is that most schools regard the Cherokee/Warrior as a more complex aeroplane, and therefore would normally consiider a succesful check ride/GFT/NFT as sufficient evidence to allow you to fly BOTH the Warrior and the Traumahawk.....er, um , sorry, Tomahawk. If you do it the other way round, then a further check flight would probably be required, although dont quote me on that. Secondly, get familiar with the type you will fly most.....It is better IMHO to use the 4 seater, as you will probably be carrying pax? It gives more flexibility.
Anyhow, both are good solid aeroplanes. Have fun,
Tailwinds,
Sky
Down, three greens, turning final