?Why is the script performance for a less efficient script better than the more efficient one

Efficient script Has about 2 to 4% performance

local tbl = {workspace.Part,workspace.Part1,workspace.Part2,workspace.Part3}


while wait() do
    for i,v in pairs(tbl) do
        v.Position = v.Position + Vector3.new(0,.01,0)
    end
end

Unefficient script

Has about .3 to .5 performance

local Part = game.Workspace.Part
local Part1 = game.Workspace.Part1
local Part2 = game.Workspace.Part2
local Part3 = workspace.Part3






while wait() do
    Part.Position = Part.Position +Vector3.new(0,.01,0)
    Part1.Position = Part1.Position +Vector3.new(0,.01,0)
    Part2.Position = Part2.Position +Vector3.new(0,.01,0)
    Part3.Position = Part3.Position +Vector3.new(0,.01,0)
end

From the performance statistics the Unefficient script is less laggier by almost 8x