不一样。差异就是差异，差别就是差别。这两个词的第一个字是一样的，读音也相同，但后面的字不一样，读音也不同。怎么一样呢？
差异和差别读音不一样。差异两个字拼音是cha,bie,两个字是读第四声。差别，差的拼音是cha,是读第一声。别的拼音是bie第二声。
nan bei cha yi
读音是：nán běi chā yì
南北差异是指我国南方北方之间的差异，由于我国南北双方所处的地理位置、气候特征、历史文化、风俗习惯以及政治经济活动等方面的不同，造成了我国南北方自然景观和人文景观的显著差异。
“sun”与“son”的读音一样，都是[s?n]
sun [s?n]
n. 太阳，阳光;恒星;中心人物
例句：
1 The sun was now high in the southern sky
太阳正高挂在南边的天空上。
2 Dena took them into the courtyard to sit in the sun
德娜带他们到院子里晒太阳。
3 She was last seen sunning herself in a riverside park.
最后一次有人看见她时，她正在河边公园晒太阳。
4 We sat there for hours talking about everything under the sun
我们在那儿坐了几个小时，谈天说地。
5 The sun came out, briefly.
太阳短暂地露了露脸。
6 The sun was shining.
阳光照耀。
7 They were trying to soak up some sun.
他们想晒晒太阳。
8 The fashion-conscious will go for anything under the sun!
流行意识将无所不在。
9 The sun's dazzle on the water hurts my eyes.
水面上耀眼的阳光刺痛了我的眼睛。
10 Venus, the Sun and Earth all moved into line.
金星、太阳和地球都到了一条直线上。
son [s?n]
n. 儿子;孩子;男性后裔
例句：
1 He shared a pizza with his son Laurence
他和儿子劳伦斯分吃了一张比萨饼。
2 Don't be frightened by failure, son.
孩子，不要害怕失败。
3 Sam is the seven-year-old son of Eric Davies
萨姆是埃里克·戴维斯7岁的儿子。
4 They have a son.
他们有一个儿子。
5 With her were her son and daughter-in-law
和她在一起的是她的儿子和儿媳。
6 She and her youngest son were finally allowed to be reunited with their family
她和小儿子终于得到允许和家人团聚。
7 His eldest son Joseph carried on his father's traditions
他的长子约瑟夫继承了乃父的传统。
8 Her son is three years old.
她儿子三岁了。
9 How old is your son now?
你儿子现在多大了？
10 He is divorced, with a young son.
他离婚了，带着一个年幼的儿子。
sun 英[s?n] 美[s?n]
son 英[s?n] 美[s?n]
从音标上看，是一样的