China clone -TCS CDP Pro and Multidiag Pro, what’s the difference?

They have three  biggest difference:

1 software: DS150E 2015R3 or 2014R3

2 pcb: one or two boards inside, and designed & produced by different factories

3 Bluetooth: with or without a BT module (and memory card)

In detail...

TCS CDP Pro china clone:

2015R3 TCSCDP Pro with Bluetooth

2015R3 TCS CDP Pro without Bluetooth

(New Design) 2015.3 TCS CDP + without Bluetooth

(New design) 2015.3 TCSCDP + with Bluetooth and 4G Memory Card

2015R3 TCSCDP Pro with Bluetooth A, best BT module (item SP122-B at obdexpress.co.uk)

PCB with a Bluetooth module

PCB with a Bluetooth A module

PCB without a Bluetooth module

Multidiag Pro china clone:

Multidiag pro with one PCB:
Multidiag pro 2015R3 DS150E Bluetooth,
Multidiag pro 2015R3 DS150 without Bluetooth, basic configuration

Multidiag pro 2015R3 DS150E Bluetooth with a 4G memory card

(Full kit) Multidiag pro 2015R3 DS150E Bluetooth with a 4G memory card, with all cables  

Multidiag pro with two PCBs:

Multidiag pro+ without Bluetooth, 2015R3 DS150E, cheapest, 

Mutidiag pro Bluetooth 2015R3 DS150E, with a 4G memory card

unit with one PCB

unit with two PCBs

The last, 

1 PCB unit or 2 PCB unit, Which one should buy?

- 1 pcb unit works good

2- 2 pcb hardware works like a charm, but must have luck... 

3- the white tcs is a good tool