Game mechanical differences between metatypes have never been this small. For this edition I really think you should just pick the metatype you want to play. Based on style rather than mechanics. Even if you like to min max.
Having said that;
Game mechanic wise the only case where metatype really matters is if you plan on building a character that focus on exceptional Strength (Unarmed / Archery) where Troll is better suited than Elf / Human or if you plan on building a character that focus on exceptional Charisma (Face / Shaman) where Elf is better suited than Troll / Ork.
Beyond that; game mechanic wise you should only pick Troll if you are going for that 9 body (because there is no other option). If you only aim for body 7 then Ork is the better option (because no 10% markup cost of Troll and because you don't have to sacrifice your only max attribute slot like Dwarf). At body 5 (or less) it doesn't really matter at all as it will just boil down to minor advantages and disadvantages, but Elf might be the slightly better option for a combat- oriented character (due to potential agility) while dwarf might be the slightly better option for a dedicated matrix-, rigging- or magic- oriented character (due to potential willpower).
Dwarf:
Short size; stocky build; perseverance. Is sometimes referred to as halfer or squat.
Thermographic vision (8 Karma), Toxin resistance (12 karma)
+ High willpower potential (resist stuff, full defense, techno firewall)
+ High strength potential (unarmed DV/AR, bow DV/AR, defend against grapple/engulf/glue)
+ Slightly higher body potential (physical condition boxes, soak damage)
--- Low reaction potential (AR piloting / initiative, defense, surprise, unarmed AR)
--- Pay 10% markup cost but only on items that need to be fitted for size (armor, clothes).
Elf:
Slender, lithe build; being attractive and knowing it. Is sometimes referred to as dandelion eater, keeb or pixie
Low-light vision (6 karma)
+ Highest charisma potential (con, influence, shaman drain, mentor spirit, watchers, techno attack)
+ Slightly higher agility potential (athletics, close combat, firearms, stealth, sprint)
Human
Average size; average build. Is sometimes referred to as breeder
+ Higher edge potential (edge boosts, edge actions, burning edge)
Ork:
Big, powerful physique; tusks; constantly being seen as outsiders. Is sometimes referred to as trog or tusker
Low-light vision (6 karma), Built tough 1 (4 karma)
+ High body potential (physical condition boxes, soak damage)
+ High strength potential (unarmed DV/AR, bow DV/AR, defend against grapple/engulf/glue)
--- Low charisma potential (con, influence, shaman drain, mentor spirit, watcher minions, techno attack)
Troll:
Being so big, you guys. Just huge. And horns. Is sometimes referred to as trog or tusker
Thermographic vision (8 Karma), Built tough 2 (8 karma), Dermal deposits (7 karma)
+ Highest strength potential (unarmed DV/AR, bow DV/AR, defend against grapple/engulf/glue)
+ Highest body potential (physical condition boxes, soak damage)
--- Low agility potential (athletics, close combat, firearms, stealth, sprint)
--- Low charisma potential (con, influence, shaman drain, mentor spirit, watcher minions, techno attack)
--- Pay 10% markup cost on all items.
--- Can't deal stun damage with unarmed