I worked through the calcs here. 
http://www.husng.com/content/suited-connector-9bbs
 
The difference between jamming low pocket pairs and suited connectors is your equity when called. 
Low pocket pairs are usually a flip (about 48-52% equity) vs villains' call open shove range. 
Suited connectors usually have equity in the range 40-45% vs villains' call open shove range. 
In both cases, you would be making most of your profit from fold equity but suited connectors have a lot worse equity when you run into a hand in villains' calling range. 
 
Low suited connectors have pretty bad equity when called (30-35%) vs what will presumably be a tightening calling open jam range as you get deeper. 
You will be losing too much the times you are called relative to what you make from fold equity that it will be a profitable play.
For example 32s @ 12BB vs a call open jam range of [AA-22,AxKx-Ax2x,AxKy-Ax2y,KxQx-Kx9x,KxQy-KxTy,QxJx,QxTx,QxJy,JxTx]
has e = 32.2%, c = 27.1%
The expectation of open jamming 3x2x vs this assumed static call open jam range @ various stack depths is: 

S
Δ (S-0.5)
Δ (S)

15
-0.22
-0.72

14
-0.12
-0.62

13
-0.03
-0.53

12
0.07
-0.43

11
0.17
-0.33

10
0.26
-0.24

9
0.36
-0.14

8
0.46
-0.04

7
0.55
0.05

6
0.65
0.15

where 
Δ (S-0.5) = expected change in stack compared to folding
Δ (S) = expected change in stack from start of hand
(Note you will need to read the post in the link above to understand the methodology behind these calculations).
 
You can see, open jamming a hand like 3x2x is pretty bad > 12BB. 
Depending on your opponent, raise-folding, limping or open folding will have better expectation.