On the big on-line tyre sites (mytyres,black circles etc ) you will often find multiple entries for what at first glance appears to be the same tyre, but at different prices. Often its because the tyre is available in a variety of load and speed ratings. Some are available as "XL" (extra load) The lower or higher price often has more to do with what stock the seller has been able to obtain at a good price on the world wholesale markets rather than any difference in its basic price.
On choosing a tyre it needs to be the correct sizes, but also meet the minimum load and speed rating quoted by Honda. But a higher load rating may have slightly stiffer side walls
I am not sure what you are hoping to achieve with 'stiffer side walls' . They may make a difference in ride comfort , handling, noise level , rolling resistance, economy etc even compared to the same model of tyre with a different load rating. But its not always in a good way . And you can get the same level of difference by choosing a different make of tyre even though it has the same speed rating. Its often just pot luck.
I wouldnt chose stiffer side walls in the hope of better resistance to side wall damage from potholes etc. Even if there is a slight difference its unlikely to be enough to protect you from a serious hit on a sharp edged pothole. The only solution is to avoid them.
I am a great fan of top quality all season tyres (Goodyear Vectors - michelin crossclimate -Vredestein etc) which have a more rugged appearance to their tread pattern. But I wouldnt expect even these give any extra sidewall protection from unmade tracks, potholes etc. ( Although I must admit I chose the 'XL' version for my Goodyear Vectors ) A few tyres are made with significantly increased rubber protection on their side walls, but mostly for serious offroaders, such as a Landrover defender.
