Now, you know the similarities and differences of both the sewing machines and confused which one you should go for.Both the sewing machines are good, though the SINGER 4423 sewing machine has added advantages of more number of built-in stitches and the buttonholes.So if you have planned to 4411, I do not see any reason of not buying SINGER 4423 instead. Because what I can anticipate the reason for not preferring SINGER 4423 over 4411 is the price And, since there is not much price difference, one can go for SINGER 4423 itself. Features SINGER 4411 SINGER 4423 SIMILARITIES Sewing Machine Type MechanicalMechanical Body Type Metallic BodyMetallic Body Free Arm YesYes Top drop-in bobbin YesYes Stitch Length AdjustableAdjustable Stitch Width 6mm max6mm max Stitch Length Width Controller Rotatory DialRotatory Dial Reverse Stitching YesYes Stitching Speed 1. 100 SPM1. 100 SPM Motor 60 more powerful than other sewing machines60 more powerful than other sewing machinesDIFFERENCES Built-in Stitch es 2311 Automatic Needle Threader YesNo Buttonhole Type 1 Step automatic4 step automatic 60 more powerful motor than other sewing machines.Heavy-duty metal frame.Fast Sewing Speed (1. 100 SPM)They can sew any type of material without any problem. Less built-in stitches.