Correct

大概 vs 大致

/ dàgài vs dàzhì /
Strokes

Formula

1
了解(一)个大概
2
知道(一)个大概
3
大致地
4
大致上

Definition

大概 as an Adjective or Noun, 大致 as an Adjective or Adverb, which both means [general; approximately; roughtly].

Example

大概 as a Noun means "general idea"; it is often used as the object of verbs. like 了解 (know something), 知道 (know something), etc. and is often preceded by 一个 or 个.
大致 cannot be used in this way.
了解(一)个大概 知道(一)个大概
1
suīrán
虽然
méi
wèn
细问
  
,
liǎojiě
了解
le
gài
大概
  

Though he didn't inquire it in detail,he got general knowledge of it.

2
Guān
关于
jiàn
shì
  
,
zhī
zhīdào
知道
gài
大概
  

I just got general knowledge of it.

大概 and 大致 as an Adjective mean "general, approximate", and function as attributives. The latter is more literary than the former.
In examples ③ and ④, 大概 and 大致 are interchangeable, but 大致 is more literary.
3
Zhè
shì
故事
gài
大概
de
qíngjié
情节
shì
shénme
什么
  
?

What's about the story?

4
Zhè
fèn
huà
计划
de
zhì
大致
nèiróng
内容
jiùshì
就是
zhèyàng
这样
  

Generally speaking,the plan is like this.

As an adverb, 大概 means "approximately or very likely" and often functions as the adverbial. It can be placed either before or after the subject. If it precedes a verb, it can take 地.
5
gài
大概
10
10
diǎn
le
  

It's about10 o'clock.

6
gài
大概
lái
le
  

He maybe cannot come.

7
gài
大概
ge
那个
rén
shì
gàn
jǐngwèi
警卫
gōngzuò
工作
de
  

Maybe he is a guard.

8
gài
大概
  
(
zhì
大致
  
)
shù
叙述
le
xià
gōngzuò
工作
yàodiǎn
要点
  

He gave a general introduction to the work essentials.

大致 means "roughly or approximately", and does not have the meaning of great possibility. It usually functions as the adverbial and either precedes or follows the subject. It can take 地 and sometimes 上.
In examples ⑧ (大概 meaning not detailed) and ⑩ (大致 meaning roughly), 大概 and 大致 are interchangeable.
In examples ⑨, 大致就绪 is a four-character set phrase, in which 大概 cannot be used.
大致地 大致上
9
men
他们
zhí
一直
máng
le
liǎng
tiān
  
,
gōngzuò
工作
fāngcái
方才
zhì
大致
jiù
就绪
  

The work was in order after he had been work- ing at it for two days.

10
shìqing
事情
de
láilóngmài
来龙去脉
zhì
大致
  
(
gài
大概
  
)
tán
tán
  

Please tell us the sequences of the event.

11
néng
zuòdào
做到
de
  
,
zhì
大致
shàng
néng
zuòdào
做到
  

I can do almost everything that he can do.