Adam's Apples

What do you get if you cross a McIntosh with a Golden Delicious?  ¶  There are many examples of that. Today we are comparing two apples: Spencer (L) and Brock.  ¶  Both are " Mcintosh x Golden Delicious ": grown from the seed of a Mac pollinated by Golden D.

Spencer is shapely, on the large side of medium-large, slightly ribbed and slightly conical. The light red blush is not saturated; it almost lets the yellow-green skin peep through. On my sample it covers perhaps two thirds of the surface, and there are light green lenticels throughout. The calyx is open to reveal great depth behind it. The flesh is crisp and a little tender, perhaps past its prime. It is white and dense and juicy as befits a descendant of McIntosh.