I wanted to do this with the final rules, since this area was changed from 1E and within the playtest itself, with Small races increasing to "normal" 25' speed while Elves of course retained higher base 30' speed with Nimble Ancestry Feat further boosting that. Making this table I assumed nothing prevented taking Nimble or Unburdened Iron via Adopted Ancestry (although one cannot take both unless actually being Elf* or Dwarf), since nothing seems to specifically indicate they are dependent on unique racial/ancestral physiology: Nimble only saying "Your muscles are tightly honed" and Unburdened only saying "You've learned techniques".
Elf = 30 = w/ Fleet, Nimble, Adopted, Unburdened ....................... = 40 = 40 hvy plate / 40 mithril
Elf = 30 = w/ Adopted, Unburdened, Fleet .................................... = 35 = 35 hvy plate / 35 mithril
Elf = 30 = w/ Nimble, Fleet ............................................................ = 40 = 30 hvy plate / 35 mithril
Elf = 30 = w/ Adopted, Unburdened ............................................. = 30 = 30 hvy plate / 30 mithril
Elf = 30 = w/ Fleet (OR Nimble) ..................................................... = 35 = 25 hvy plate / 30 mithril
Elf = 30 = ........................................................................... ........... = 30 - 20 hvy plate / 25 mithril
Normal= 25 = w/ Fleet, Adopted, Unburdened ...............................= 30 = 30 hvy plate / 30 mithril
Normal= 25 = w/ Adopted, Unburdened ......................................... = 25 = 25 hvy plate / 25 mithril
Normal= 25 = w/ Fleet ................................................................... = 30 = 20 hvy plate / 25 mithril
Normal= 25 = ........................................................................... .... = 25 = 15 hvy plate / 20 mithril
Dwarf = 20 = w/ Fleet, Unburdened, Adopted, Nimble ................... = 30 = 30 hvy plate / 30 mithril
Dwarf = 20 = w/ Fleet, Unburdened .............................................. = 25 = 25 hvy plate / 25 mithril
Dwarf = 20 = w/ Unburdened ......................................................... = 20 = 20 hvy plate / 20 mithril
Dwarf = 20 = w/ Fleet ...................................................................... = 25 = 15 hvy plate / 20 mithril
Dwarf = 20 - ........................................................................... ....... = 20 = 10 hvy plate / 15 mithril
Versatile Human w/ General Training is fastest (already reaching it's max) at Lvl 1,
Elf w/ Nimble is next, then Dwarf w/ Unburdened, then Normals, and then Dwarfs without Unburdened.
At Lvl 3, Elf w/ Nimble+Fleet are fastest followed by Humans w/ Fleed+Adopted+Unburdened, followed by both Dwarves with Fleet+Unburdened.
At Lvl5, Halfing with Cultural Adaptability(Dwarf+Unburdened)+Fleet reach their max (same as Human) and surpass all Dwarfs,
At Lvl7, Dwarves w/ Unburdened+Fleet+Adopted(Elf)+Nimble reach their max to equal the max of "Normal" speed Ancestries.
*I guess Half-Elf would be intermediary position, above Normal max but below Elf max:
Counting as Elf to take Nimble as well as Adopted Ancestry (Dwarf) for Unburdened Iron, but with only 25 base speed.