UHS1 vs. Class 10 sd card (Samsung dv100)
Here is some reasoning based on numbers:


You don't need a fast card for video. It is generally advised to use at least class 6 for video recording on a consumer AVCHD device:

Max recording bit rate of AVCHD 2.0 is 28&nbsp;Mbit/s and minimum write speed of a class 6 card is 48&nbsp;Mbit/s, this should provide enough headroom even with an almost full card.
Your camera doesn't mention UHS-I in it's specs, only SDHC. So if you use a UHS-I card, it will be limited below 25&nbsp;MByte/s, which is still faster than many class 10 cards.

For shooting pictures in continuous (burst) mode: when the high speed memory buffer of the camera fills up, you will continue to shoot below 25&nbsp;MByte/s, about 3 images per second or less.
Using high speed card reader, transferring a full 32&nbsp;GB UHS-I Class 1 card will take you maximum about an hour.


Take a look at this list of some bitrates for cards, cameras and video formats. 

                        MEGABYTE/S    MEGABIT/S

---- 1080p30 Consumer ----
          AVCHD              3.0         24     also in some prosumer cams
        AVCHD 2.0            3.5         28
------ 1080p30 Pro -------
          DNxHD             9-28     36-220
         ProRes            12-41    100-330
        AVC-Intra           6-55     50-440
  Compresed CinemaDNG         60        480     roughly, as seen in BMPCC
        12-bit Raw            89        712    

---- 16 Mpix Picture -----                      File size per picture
  Uncompressed 14-bit Raw     27        214
   Lossless Raw (NEF,CR2)     20        160     roughly
           JPEG                8         64     roughly

------ SD Card Class -----                      
          Class 2            2.0         16     Card class is the minimum speed
          Class 4            4.0         32     of the card according to the spec,
          Class 6            6.0         48     measured with empty card
          Class 10          10.0         80
------- SD Card BUS ------                      
            SD              12.5        100     Bus speed: speed of interface
          SDHC/XC           25.0        200     between device and card,
                                                data transfer speed is lower.
--- UHS SD Card Class ----
    UHS Speed Class 1       10.0         80
    UHS Speed Class 3       30.0        240
---- UHS SD Card BUS -----
       SDXC UHS-I         50/104    400/832
       SDXC UHS-II       156/312  1248/2496