1) is advertising a blue gem knife which is also in its inventory, however the trade offer link goes to a different account, 2), which is made to look exactly identical, with a regular case-hardened knife. The potential victim is thus tricked into sending an offer for the regular knife, while believing that they get a blue gem which is worth significantly lot more.
Inspect link for regular knife: steam://rungame/730/76561202255233023/+csgo_econ_action_preview%20S76561198254807345A7556147410D14297394908287684775
Found after following the trade offer link on both profiles,
https://steamcommunity.com/tradeoffer/new/?partner=294541617&token=ergTRdYEInspect link for the blue gem, found on love1434455
steam://rungame/730/76561202255233023/+csgo_econ_action_preview%20S76561198254775795A5135606562D14297394908287684775
https://steamcommunity.com/id/love1434455/inventory/#730_2_5135606562