The results of the tests with five different CD media presented in the diagrams suggest that the real characteristics of these two optical drives differ when they are processing discs of some formats. The LG GDR-8163B almost reached its declared maximum read speed on the CD-ROM and CD-DA discs, but only had a speed of 41x with the CD-R and CD-RW discs. The Samsung TS-H352 met its specifications with the CD-ROM and exceeded it with the CD-R, but processed the CD-RW and CD-DA at about 32x speed only. The access time of the Samsung TS-H352 is again measured to be smaller than that of the LG GDR-8163B; the measurements comply with the specifications of the devices.