Choose one large statue if you want a single scene to dominate the display. Choose several smaller figures if you prefer variety and rearranging. The better option depends on the space and characters you actually want, not on which choice gives you the highest item count.
Design the view before choosing the quantity
Stand where you normally see the shelf. From across a room, a larger silhouette may be easier to appreciate than several tiny details. From a chair beside a desk, small figures can be easy to enjoy individually.
A centerpiece can give a display a clear focus, but its effects or base may occupy more space than the character's height suggests. Several smaller pieces can also consume substantial depth once their bases and gaps are included. Compare the complete footprints rather than adding only their heights.
Try both layouts with paper
Mark the usable shelf area on paper. Draw the confirmed footprint of the large candidate, then make a second layout with the smaller candidates. Leave access for placing and lifting the pieces, and check the furniture's load guidance separately.
For example, a 25 cm-wide centerpiece and three 10 cm-wide bases are not equivalent uses of a shelf. The three bases already total 30 cm before gaps, while the centerpiece may have a wide accessory outside its base. This is a planning example; use the actual maximum dimensions for your shortlist.
Consider what you want to look at repeatedly
A large piece commits more of the display to one character or moment. That can be rewarding if it is exactly the scene you want. If your favorites change frequently or you enjoy several series equally, a smaller group may suit your interests better.
There is also a practical tradeoff. A multi-piece arrangement means more individual objects to lift and clean around. A large statue may be harder to move or store. Neither choice is automatically easier; inspect the construction and packaging of the actual products.
Compare complete costs, then choose a first step
Include delivery and any display changes in both options. Do not buy several lesser favorites solely because their combined price resembles that of a centerpiece. Equally, do not choose a large statue just because it appears more impressive in a photograph.
If neither layout feels right, start with one smaller favorite and preserve the remaining space. A display can develop gradually. Use the statue collection at Super Saiyan Sphere to build two realistic shortlists, then choose the arrangement you would prefer to see every day.