Dota – Difference between “Repick” and “Back to browsing”

Half-Carries or Semi-Carries are heroes that have the potential to carry the team in mid and lategame but will lose most likely to any "hard" carry.

The difference is the fact that a semi-carry has a better early game (escape mechanism, better farming tools, more teamfight potential for mid-game and overall more flexible[movement and items]) resulting in a much faster scale to late-game.

Examples of semi-carries are:

• Mirana (she can dish out a ton of damage but can also gank, solo, farm with spells, etc)
• Queen of Pain (aoe spells to spam and farm, ganking , solo) simply carries the team till late [when magic dmg isn't relevant anymore] and then pass the role to the real (hard) carry.

compared to hard-carries:

• Faceless Void (needs a babysitter, has no teamfight potential until he has his core items, no aoe spells to farm creeps)
• Spectre (same as void)

Furthermore the hard-carry has a ability that scales incredible well in late game (semi-carry lack these). For example: void - backtrack + time lock; spectre - dispersion + desolate; weaver - geminate attack; morphling - morph + adaptive strike; naix - feast + rage.

In dota 2, to be able to go back to the fountain with any heroes you need to own either a TP Scroll or Boots of Travel. If you have one of those in your inventory you can double tap the hotkey of the inventory slot to teleport to fountain. Hotkeys for inventory slot can be set in the parameters menu.

If your question concerns the action "Walk back to the fountain", there are none such command (unlike courier who has a "back to the fountain" action).