I won't back this up with much, because I don't have to back this up much to make the call. The PS5 will be less expensive than the Xbox Series X. BTW: Folks don't take this so seriesly you get mad. Lets have a nice civil discussion
1) Sony came out with PS4 at a lower price compared to Xbox One - the strategy worked well for quickers sales out of the gate. PS4 Pro came out at a Lower Price than Xbox One X too - again, it worked, because again it sold better too.
2) Sony was burned by it high price not a bad system for PS3. Sure, it was harder to program for, but 90% of games are made with middleware. Harder was very relative. The PS3 didn't lack for games, it had slow sales. Sales can be attributed greatly to what customer thought of the price. Once bitten twice shy baby, they won't come out higher than Microsoft
3) If leaks are true PS5 will have a about the same processor, but will likely have a smaller APU die. Sony's choice for GPU core count is smaller, its choice for memory bus is smaller too -if rumor are to be believed. Smaller APU die means more chips fit on a wafer even ift is just 4 more or two more. More chips on a wafer means all thing being equal they get a bigger yield of chips on a wafer. There could be be a greater % of yield on a smaller chip with less graphics cores; but that is more theatrical. Bottom line is more PS5 APUs will come off one wafer as long as there are not defect yield issues...issues that Xbox can suffer as well. Which is why we say, 'all things being equal.'
4) It is hard to say, because there is variance isn GPU core count and speed and memory bus; but less cores on a smaller APU is LIKELY to means the PS5 chip will have a lower TDP thermal design power (TDP) or thermal design point. Less energy can mean less heat, less heat can mean Sony can get away with a smaller internal power supply; a smaller power supply generates less heat itself. A few small % drops in heat generated can add up. A smaller of less complex cooling solution would be less expensive. Sony could have more wiggle room for power supply and cooling, which means more wiggle room for console size and weight.
- Better APU yield if more dies fit on the wafer
- less power needed on a smaller die that has less GPU cores, less power means less cooling needed
- possibly less costly power supply and less expensive cooling solutions because of above
- less complex to build system is faster to make and easier to test and/or ship
If nothing else that last two console cycle have show that overall CPU/GPU throughput does not always lead to the best sales. Consoles are a balance of "how good can this look" vs "cost". The Xbox Series X could very well be process more screens faster or shineyer. But, how much better and at what cost? I think Microsoft has gotten caught up in the "We have to be better, we have to be a few FPS faster, we have to make PC and console games the same!" Better specs are...better. But, if they come in $75 to $100 more expensive they will lose a % of customers. Console games on Xbox One X and PS4 Pro look good, to sell new system they system have be worth getting.