It can be tricky to tell what size of the head is better than another in terms of stiffness. If you increase the head size, you'll be able to generate a little more power. The differences are minimal, so saying a rectangular frame with 98 square inches of space is as powerful as one with 95 square inches of space is not always true.
With a larger head-size racquet, you get greater rotational stability since the strings are spread out over a bigger area. Weight distribution on the frame is dependent on how far from the center of the stringbed it is. The farther it is from the center, the more force is required to twist the racquet in your hand.
The racquet can resist twisting more when you hit the ball off-center, which helps you avoid miss-hits and balls which go in the wrong direction. Therefore, courts with larger head sizes typically use the term 'forgiving' when reviewing racquets.
In most cases. 98 to 100 square inches is the ideal size.
Unless you focus on what you are doing, you will fail to reach your full potential. A racquet should be accessible to you whenever you need it. You can hopefully find the right one with the help of this guide.