Which elevator should I choose?

SWYFT Box Elevator vs SWYFT Telescoping Elevator. Both are 2-stage with a rope-driven second stage.

Compare	SWYFT Box Elevator From $549.99 USD	SWYFT Telescoping Elevator $399.99 USD
Stages	2-stage	2-stage
First stage drive	Chain driven	Gear driven
Second stage drive	Rope driven	Rope driven
Stroke	Same stroke length	Same stroke length
Strength / rigidity	Stronger and more rigid	Less rigid than the Box
Carriage	Yes	No
Size / weight	Larger and heavier	Super compact
Build & mounting	Easier to build and attach to your robot	Better for highly customizable designs
Rotating arms	—	Better for mounting on rotating arms
Maintenance	Easier to maintain	—
Lifting robots (climb)	Can lift robots	Can lift robots
Best for	Moving game elements from the bottom of the robot to the top	Game objects that are already near the top of the robot

Stages: Box2-stage; Telescoping2-stage
First stage drive: BoxChain driven; TelescopingGear driven
Second stage drive: BoxRope driven; TelescopingRope driven
Stroke: BoxSame stroke length; TelescopingSame stroke length
Strength / rigidity: BoxStronger and more rigid; TelescopingLess rigid than the Box
Carriage: BoxYes; TelescopingNo
Size / weight: BoxLarger and heavier; TelescopingSuper compact
Build & mounting: BoxEasier to build and attach to your robot; TelescopingBetter for highly customizable designs
Rotating arms: Box—; TelescopingBetter for mounting on rotating arms
Maintenance: BoxEasier to maintain; Telescoping—
Lifting robots (climb): BoxCan lift robots; TelescopingCan lift robots
Best for: BoxMoving game elements from the bottom of the robot to the top; TelescopingGame objects that are already near the top of the robot

You need to take game elements from the bottom of your robot to the top. The carriage makes that easy.
You want the stronger, more rigid elevator.
You want something easy to build, attach to your robot, and maintain.
You prefer a chain-driven first stage.