There is no question those are fruit buds in that top photo and bottom photo. It is not to late to graft the timing is about perfect. Typically grafts do best on the highest part of a tree on a dominant branch. If you have a central leader the top of it would be a great place for a graft. You can have as many pears on the same tree as you want but some pears grow faster than others. The small slender bud on the bottom photo is more like a leaf bud. It is actually a undeveloped fruit bud The fat buds are developed flower buds that will become your fruit.
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